Fix dbmirror for new backslash escaping:

Martin Pitt [2006-06-16  0:15 +0200]:
> Upstream confirmed my reply in the last mail in [1]: the complete
> escaping logic in DBMirror.pl is seriously screwew.
>
> [1] http://archives.postgresql.org/pgsql-bugs/2006-06/msg00065.php

I finally found some time to debug this, and I think I found a better
patch than the one you proposed. Mine is still hackish and is still a
workaround around a proper quoting solution, but at least it repairs
the parsing without introducing the \' quoting again.

I consider this a band-aid patch to fix the recent security update.
PostgreSQL gurus, would you consider applying this until a better
solution is found for DBMirror.pl?

Martin Pitt        http://www.piware.de

diff --git a/contrib/dbmirror/DBMirror.pl b/contrib/dbmirror/DBMirror.pl
index 591b039816fe25b40e4f8bed0226f0168dc53442..22c8e5c0ece06de94c00fcbbbb7eb9f08c775d7f 100755 (executable)
--- a/contrib/dbmirror/DBMirror.pl
+++ b/contrib/dbmirror/DBMirror.pl
@@ -33,7 +33,7 @@
 # 
 #
 ##############################################################################
-# $Id: DBMirror.pl,v 1.6.4.1 2006/05/21 19:57:06 momjian Exp $ 
+# $Id: DBMirror.pl,v 1.6.4.2 2006/07/06 02:02:48 momjian Exp $ 
 #
 ##############################################################################
 
@@ -852,7 +852,7 @@ sub extractData($$) {
        $matchString = $1;
        $value .= substr $matchString,0,length($matchString)-1;
 
-       if($matchString =~ m/(\'$)/s) {
+       if($matchString =~ m/(\'$)/s and (substr $dataField,length($matchString),1) ne "'") {
          # $1 runs to the end of the field value.
            $dataField = substr $dataField,length($matchString)+1;
            last;